#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n, m;
    cin >> n >> m;
    const int s = 1 << m;
    vector<int> count(s);
    for (int i = 0; i < n; i++)
    {
        int x = 0;
        for (int j = 0; j < m; j++)
        {
            int k;
            cin >> k;
            x |= k << j;
        }
        count.at(x)++;
    }
    vector<int> dp(s);
    dp.at(0) = 1;
    for (int i = 0; i < s; i++)
    {
        for (int j = 0; j < m; j++)
        {
            if (i >> j & 1)
            {
                continue;
            }
            int next = i | (1 << j), sub = s - 1 - i, diff = 0;
            for (int k = sub;; k = (k - 1) & sub)
            {
                if ((k + i) >> j & 1)
                {
                    diff += count.at(k + i);
                }
                else
                {
                    diff -= count.at(k + i);
                }
                if (k == 0)
                {
                    break;
                }
            }
            if (diff >= 0)
            {
                dp.at(next) += dp.at(i);
            }
        }
    }
    cout << dp.back() << endl;
    return 0;
}